With reference to India's freedom struggle, consider the following events:
1. Jallianwala Bagh Massacre
2. Dissatisfaction with Montagu-Chelmsford Reforms
3. Rowlatt Act
4. Khilafat Agitation
Which of the above-mentioned events were the reasons behind the launch of the 'Non-cooperation movement'?
1
1 and 3
2
2 and 4
3
1, 2 and 3
4
1, 2, 3 and 4